Simplify equality operators

std::vector has operator==() and operator!=() which work fine for us
here.

Author: joto

src/geom.cpp

@@ -9,25 +9,11 @@
 
 #include "geom.hpp"
 
-#include <algorithm>
-
 namespace geom {
 
-bool operator==(point_list_t const &a, point_list_t const &b) noexcept
-{
-    return std::equal(a.cbegin(), a.cend(), b.cbegin(), b.cend());
-}
-
-bool operator!=(point_list_t const &a, point_list_t const &b) noexcept
-{
-    return !(a == b);
-}
-
 bool operator==(polygon_t const &a, polygon_t const &b) noexcept
 {
-    return (a.outer() == b.outer()) &&
-           std::equal(a.inners().cbegin(), a.inners().cend(),
-                      b.inners().cbegin(), b.inners().cend());
+    return (a.outer() == b.outer()) && (a.inners() == b.inners());
 }
 
 bool operator!=(polygon_t const &a, polygon_t const &b) noexcept

src/geom.hpp

@@ -105,12 +105,6 @@ class point_list_t : public std::vector<point_t>
     : std::vector<point_t>(list.begin(), list.end())
     {}
 
-    friend bool operator==(point_list_t const &a,
-                           point_list_t const &b) noexcept;
-
-    friend bool operator!=(point_list_t const &a,
-                           point_list_t const &b) noexcept;
-
 }; // class point_list_t
 
 class linestring_t : public point_list_t